Pump.



'No. 859,752. v PATENTED JULY 9, 1907. L. M. G. DELAUNAY-BELLEVILLB.

PUMP.. APPLICATION FILED NOV.19, 1000.

2 SHEETS-SHEET 1.

THE NORRIS PETERS ca., WASHING7ON, u. c.

No. 859,752. PATENTED JULY 9, 1907. L. M. e. DELAUNAY-BELLEVILLE.

PUMP.

APPLICATION FILED NOV. 19, 1906.

2 SHEETS-SHEET 2.

1n: mamas PETERS ca, WASHINGTON o c UNITED srAT s PATENT OFFICE.

LOUIS GABRIEL DELAUNAY-B'ELLEVILLE, OF NEUILLY, FRANCE, ASSIGNOR TO THESOOIETE ANONYME DES AUTOMOBILES DELAUNAY-BELLEVILLE, OF SEINE, FRANCE, A

CORPORATION .OF FRANCE.

PUMP.

Specification of Letters Patent.

Patented Jur 9, 1907.

Application filed November 19, 1906. Serial 344,111.

a To all 'whom it may concern:

Be it known that I, LOUIS MARIE GABRIEL DE- LAUNAY-BELLEVILLE, a citizenof the French Republic,

residing at Neuilly, Department of the Seine, France, (and whosepost-office address is 17 Boulevard Richard- Wallace, in the said city,)have invented-certain new and useful Improvements in or Relating toPumps, of which the following is a specification.

This invention has for its object a pump by means of which it ispossible to transfer a given quantity of liquid, and particularly aliquid of a viscous nature from one reservoir to another. Thesereservoirs may be situated either at the same or at different levels,and the operation of the pump takes place without the assistance of anycock, valve, or like device as it has been found that movable obturatingparts are liable either to become stuck owing to the viscous nature ofthe liquid, or that leaks occur owing to the interposition of foreignmatter between the obturating part and its seat.

The apparatus in accordance with the present invention is of generalapplication.

In the accompanying drawing: Figure 1 is a diagram illustrating the twocases which may arise apart from equality of level between the tworeservoirs. Fig. 2 represents a vertical section on the line XX of Fig.3, through a pump intended to supply a lubricant to the gear case of themotor of a motor road vehicle.- Fig. 3 represents a horizontal sectionthrough the same on the line YY of Fig. 2.

Referring to the Fig. 1 the left hand or receiving reservoir S possessesa lower level than the supply reservoir E; on the right hand side,however, the re ceiving reservoir S is arranged at a higher level.

The system is operative if certain conditions of discharge and flow arefulfilled; the conditions of discharge are as follows: For the left handside, that the volumeAof the pump is greater than the volumez'of thetube 0 which is situated above the level of the reservoir E; for theright hand side, that the volume A of the pump is greater than thevolume 1" of the tube 0 situated above the level of the reservoir E. Thecondition of flow is that the height h (or k) is sufficient to enablethe volume (A'i) or (Ai) to flow through the' The apparatus may also beapplied to the intermittent decantation of given and approximatelyconstant quantities of liquids of any kind, its greatest advantagesbeing experienced with liquids of a viscous nature.

Referring now to Figs. 2 and 3. A piston a reciprocates in a pump body Aand is moved back by the spring I) placed within the compartment Bsituated above the pump body. A compartment O is arranged beside thepump body -A and the compartment O and contains the tube 0 through whichthe oil passes at each stroke of the piston. The rod 1 is screwed intothe piston aand carries a socket 2 which serves as a support for thespring b, through the intermediary of a collar 2 upon which the saidspring is mounted. The other extremity of the spring bears upon a plate3, fixed to form the bottom of the compartment B, and through which therod 1 passes freely. On the top of this red a pedal 4 is provided whichmay be depressed by the foot in order to cause the descent of the pistona The compartment B is closed by a cover 5, the central elongated partof which serves as guide for the rod 1; the bottom 6 of the pump body Ais prolonged projects below the compartment 0 in such a manner asv toform the conduit 7 and a plug D is screwed into the bottom of thecompartment O. This plug D also forms a joint on the bottom 6 and whichis screwed or brazed to it provided with orifices 8, 8 which place thetube 0 in communication with the pump. The compartment 0 is closed atits upper part by means of a screw plug 9 provided with an orifice 10for the circulation of air.

The oil reservoir E to which the pump is firmly fixed by two flangesforming joints, is provided with a lid in which an air hole is found andis in constant communication with the pump body A by means of therectangular conduit 6 and with the compartment B by means of therectangular conduit e. The joints of the pump body A and of thecompartment B with the reservoir E are formed on a level with theorifices e, e as shown in Fig. 3 as regards the conduit 6. Finally, theoil enters the gear case through the tube 11.

In the condition of repose, the piston or is above the conduit e, asshown in Fig. 2; the oil fills the whole of the pump body and descendingby gravity through the conduit 7, passes through the orifices 8 of theplug D and rises in the tube 0 where the level is established at thesame height as the level of the reservoir. The summit of the tube 0being slightly higher than the maximum level in the reservoir no flowcan take place; siphon action being also impossible, owing to thecommunication of the compartment G with the atmosphere through theorifice 10 By depressing the piston a, the entire quantity of lubricantcontained in the cylinder and situated below the rectangular orifice e,is forced out and being discharged above the tube 0, descends into thecompartment O, and flows into the gear case through the conduit 11. Assoon as pressure upon the rod of the piston a ceases, this piston israised by the spring b which has been compressed during the descent ofthe piston and resumes its upper position.

While the piston a is within that part of the cylinder A below theorifice c, the oil from the reservoir E flows freely above the piston isagain raised, the conipartment B contains oil, the level of which isslightly higher than that of the reservoir. This oil returns to thereservoir through the orifice e as soon as its level attains thisorifice.

The arrangement which has been described, avoid choking the gear case, adefect frequently caused by an ordinary pump provided with a non-returnvalve which closes under the influence of a spring, in the event of animpurity getting under the valve and pre venting the same from closingcompletely, as in this case the flow of oil is continuous.

Having now particularly described and ascertained the nature of my saidinvention and in what manner the same is to be performed, I declare thatwhat I claim is:

An apparatus for transferring a liquid in successive quantities from onereservoir to another, comprising a valveless pump divided into twocompartments by a diaphragm, the lower compartment being in constantcommunication with the lower part of the suction reservoir, and theupper compartment being in constant communication with the upper part ofthis reservoir; the bottom of the pump body being provided with a tubeopening at a higher level than the maximum level of the liquid in thereservoir, into a bell connected at its base with the transferreservoir, communicating at its summit with the atmosphere, the lowercompartment of the pump containing a piston, the rod of which passesfreely through the diaphragm and is provided with actuating meanssubstantially as described.

In testimony whereof I have hereunto set my hand in presence of twosubscribing witnesses.

LOUIS MARIE GABRIEL DELAUNAY-BELLEVILLE.

Witnesses:

EMILE KLOTz, MAX on RIVAUD.

